shorewall_code/Shorewall-docs2/shorewall_prerequisites.xml
teastep 05a39f6d25 Stress linux
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@2108 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
2005-05-13 03:05:09 +00:00

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<article id="shorewall_prerequisites">
<!--$Id$-->
<articleinfo>
<title>Shorewall Requirements</title>
<author>
<firstname>Tom</firstname>
<surname>Eastep</surname>
</author>
<pubdate>2005-05-12</pubdate>
<copyright>
<year>2001-2005</year>
<holder>Thomas M Eastep</holder>
</copyright>
<legalnotice>
<para>Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version
1.2 or any later version published by the Free Software Foundation; with
no Invariant Sections, with no Front-Cover, and with no Back-Cover
Texts. A copy of the license is included in the section entitled
<quote><ulink url="GnuCopyright.htm">GNU Free Documentation
License</ulink></quote>.</para>
</legalnotice>
</articleinfo>
<section>
<title>Shorewall Requires:</title>
<itemizedlist>
<listitem>
<para>A <emphasis role="bold">Linux</emphasis> kernel that supports
netfilter (No, it won't work on BSD or Solaris). I've tested with
2.4.2 - 2.6.11. Check <ulink url="kernel.htm">here</ulink> for kernel
configuration information.</para>
</listitem>
<listitem>
<para>iptables 1.2 or later (but I recommend at least version
1.2.9)</para>
</listitem>
<listitem>
<para>Iproute (<quote>ip</quote> utility). The iproute package is
included with most distributions but may not be installed by default.
The official download site is <ulink type="remote"
url="http://developer.osdl.org/dev/iproute2/download/">http://developer.osdl.org/dev/iproute2/download/</ulink>.</para>
</listitem>
<listitem>
<para>A Bourne shell or derivative such as bash or ash. This shell
must have correct support for variable expansion formats
${<emphasis>variable%pattern</emphasis>},
${<emphasis>variable%%pattern</emphasis>},
${<emphasis>variable#pattern</emphasis>} and
${<emphasis>variable##pattern</emphasis>}.</para>
</listitem>
<listitem>
<para>Your shell must produce a sensible result when a number n (128
&lt;= n &lt;= 255) is left shifted by 24 bits. You can check this at a
shell prompt by:<itemizedlist>
<listitem>
<para>echo $((128 &lt;&lt; 24))</para>
</listitem>
<listitem>
<para>The result must be either 2147483648 or
-2147483648.</para>
</listitem>
</itemizedlist></para>
</listitem>
<listitem>
<para>The firewall monitoring display is greatly improved if you have
awk (gawk) installed.</para>
</listitem>
</itemizedlist>
</section>
</article>